Improved piano-seat



STATES 4 ETE i;

PATENT Orme.

-llvlPRovlD PIANo-SEAT.

Specification forming part of Letters Patent N0. 54,401, dated May l', 1866.

To all whom t may concern:

Be it known that we, LoUIs PosTAWKA and ANTON KRAsINsKr, both of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and Improved Piano- Seat, and we do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and the letters of reference marked thereon, in whichv' Figure l represents the pianoseat in perspective. Fig. 2 represents a side view of one end of the seat-frame. Fig. 3 represents a side view of the other end of the seat-frame. Fig. et represents a transverse section of end of the seatframe. Fig. 5 is an end view of standards attached to seat. Fig. 6 represents same as Fig. 4, with slot dovetailed. Fig. 7 is an inside View of an end piece to the frame or stand.

l The nature of our invention consists in making a piano-seat, of any desired shape and dimensions, in such a manner thatit may be readily raised or lowered, as desired, Without itself being turned round, and at the same time be perfectly rm and steady at any and all points of elevation.

To enable others skilled in the art to make and use our invention, we'proceed to describe its construction and operation.

We make the frame or stand a of any desired shape and dimensions, having two parallel cross braces, b, running horizontally from a point below the center of end piece c to a point below the center of end piece d, to which they are iirmly attached. From the middle of the upper part of end piece c to the middle of the upper part of end piece d two cross-beams, c and f, pass horizontally, and (placed one above the other so as to leave a space between them) are firmly attached to said end pieces by means of tenons and mortises or in other suitable manner.

Below the cross-beams e and f, and of equal thickness with the tenon Z of the cross-beams, a guide, g, runs down the middle of end pieces, c and d, and is firmly attached to them.

In the center of cross-beams e and f a hole is bored of the desired size, into which metallic sockets, attached to plates of the same material, and of convenient dimensions to be iirmly fastened to beams e andf, are inserted. The seat 7L is made of a shape and dimerisions to correspond with frame or stand a, and having two cross-braces, t' and j, on the under side, and running parallel to each other and to the longest side of the seat, and of a distance apart equal to the Width of the crossbeams e and f in frame a. Upon the top of cross-braces i and j, and running across them at right angles, is a broad brace, k, which is firmly fastened to said braces and also to the side pieces of seat h. A metallic plate or brace, m, may also run across the top of braces i and j, under broad brace 7c, and be firmly attached to them all.

To the under side of each end of seat 7L standards n are attached, made of any desired pattern, and so set as to just slip inside of end pieces, o and d, in frame a. These standards a are made with a slot, a, running up and down the middle of each, to fit the tenons l and guides g, on which they run. Into the center of metallic brace m and brace la the end of a screw, o, is rmly iixed, and runs down in a perpendicular line through the metallic sockets in cross-beams e and f and wheel p into stretcher g.

Between the cross-beams e and f is a horizontal wheel, p, whose hub rests upon metallic plate r, on which it turns. In the 'center of this hub a female scre'w, fitting male screw o, is cut, and the male screw o passes through it and sockets into stretcher q, as above described. The diameter of wheel p is about the same as the width of seat h, and the outer rim of the wheel is provided with hand-spokes t. By turning wheel p the seat h is raised or lowered by means of screw 0, and the standards a slide up and down on the inside of end pieces c and d in frame a, the slot u allowing them to pass the tenons t and guides g, by means of which they are kept in position and made firm and strong at all points of elevation.

The stretcher q is attached at each end to the lower ends of standards a by means of screws or'glue, and gives additional strength and rmness to the seat 5 but it is not indispensable, and may be taken ott or omitted en- 2. The Whole piano-seat, constructed in the manner and forthe purposes set forth.

LOUIS POSTAWKA. ANTON KRASINSKI.

Witnesses A. F. BADGER, GEo. GRIGGs. 

